🎄【Materials and Process Upgrading】- Thickened universal steel column, thickening plate and double support bearing. High strength stainless steel electrophoresis stand, wear resistant mute steel ball. Casters are made of superior polyurethane with strong abrasion resistance, silent shock absorber, wearproof, no drag marks. And enhance the impact resistance of the whole castor. Total Load Capacity - 800lbs. | 🎄【High quality materials & Sturdy】 - High-grade silent caster wheels for office chair ect-Rotate 360 degrees. Soft and non-skid wheels won't mark floors. Exclusive non-marking wheels for use on hardwood floor. easily fixed when moving, and move quietly and smoothly. | 🎄 【Dual Locking and Convenience】 - The total locking brake locks both the wheel and the swivel simultaneously. 2 inch caster Wheels are life convenient, wear-resisting, durable. Easy to clean wheels. Easy maneuverability and easily assembled. | 🎄 【Multiple Used】- The noise-Free rubber wheels are ideal for a huge variety of uses DIY to industrial applications for Furniture and Workbench. Perfect casters for small equipment and small space furniture including ottoman, coffee table, plant stands, bookshelves, shoe bins, toy bins, shopping carts, workbench, underbed storage. | 🎄 【2 Years WARRANY】- 2 years Return your money in full, Free replacement, for any reason and without a justification. Buy it without hesitation. Pack comes with 4 casters with brakes + Free 16 Screws + a screwdriver.